Limnopolar Lake is one of the numerous freshwater lakes on the ice-free Byers Peninsula, Livingston Island in the South Shetland Islands, Antarctica. The feature is oval in shape, extending 175 m in southeast-northwest direction and 140 m in southwest-northeast direction. It drains through a 2.7 km stream westwards into Osogovo Bay north of Point Smellie. The lake's name derives from the extensive limnological research in the area carried out by the Spanish Antarctic programme.